Organic electroluminescent device, display and illuminating device
View Patent ↗Disclosed is an organic electroluminescent device having high emission luminance, high external quantum efficiency and long lifetime. Also disclosed are a display and an illuminating device. The organic electroluminescent device is characterized in that it comprises, between a pair of electrodes, a constituent layer including at least a phosphorescence emission layer, wherein at least one in the constituent layer contains a compound represented by formula (1),
1. An organic electroluminescent device comprising, between a pair of electrodes, a constituent layer including at least a phosphorescence emission layer comprising a metal complex containing a metal belonging to groups 8 through 10 of the periodic table as a center metal, wherein at least one in the constituent layer contains a compound represented by formula (1),
wherein A 1 and A 2 represent a substituent; n1 and n2 independently represent an integer of from 0 to 3; X 1 represents an oxygen atom, a sulfur atom, an alkylene group, an imino group, a carbonyl group, a sulfoxide group or a sulfonyl group; X 2 represents an oxygen atom, a sulfur atom, an alkylene group, an imino group, a carbonyl group, a sulfoxide group, or a sulfonyl group provided that when X 1 represents an alkylene group, X 2 represents a sulfur atom, an imino group, a carbonyl group, a sulfoxide group, or a sulfonyl group; and B 1 and B 2 represent a group represented by formula (2),
wherein Z 1 and Z 2 represent an atomic group necessary to form a substituted or unsubstituted aromatic heterocyclic ring or a substituted or unsubstituted aromatic hydrocarbon ring; and Z 3 represents a divalent linkage group or a chemical bond.
2. The organic electroluminescent device of claim 1 , wherein in formula (1), X 1 and X 2 independently represent an oxygen atom, a sulfur atom, an alkyene group, an imino group, a carbonyl group, a sulfoxide group or a sulfonyl group.
3. The organic electroluminescent device of claim 1 , wherein Z 1 of formula (2) represents an atomic group necessary to form a substituted or unsubstituted aromatic hydrocarbon ring.
4. The organic electroluminescent device of claim 1 , wherein the compound represented by formula (1) is contained in the phosphorescence emission layer.
5. The organic electroluminescent device of claim 1 , wherein the constituent layer further includes at least one hole inhibiting layer containing the compound represented by formula (1).
6. The organic electroluminescent device of claim 1 , emitting a blue light.
7. The organic electroluminescent device of claim 1 , emitting a white light.
8. An organic electroluminescent device comprising, between a pair of electrodes, a constituent layer including at least a phosphorescence emission layer comprising a metal complex containing a metal belonging to groups 8 through 10 of the periodic table as a center metal, wherein at least one in the constituent layer contains a compound represented by formula (4),
wherein A 1 and A 2 represent a substituent; n1 and n2 independently represent an integer of from 0 to 3; and B 1 and B 2 represent a group represented by formula (2),
wherein Z 1 and Z 2 represent an atomic group necessary to form a substituted or unsubstituted aromatic heterocyclic ring or a substituted or unsubstituted aromatic hydrocarbon ring; and Z 3 represents a divalent linkage group or a chemical bond.
9. The organic electroluminescent device of claim 8 , wherein Z 1 of formula (2) represents an atomic group necessary to form a substituted or unsubstituted aromatic hydrocarbon ring.
10. The organic electroluminescent device of claim 8 , wherein Z 1 of formula (2) represents an atomic group necessary to form a substituted or unsubstituted aromatic heterocyclic ring.
11. The organic electroluminescent device of claim 8 , wherein the compound represented by formula (4) is contained in the phosphorescence emission layer.
12. The organic electroluminescent device of claim 8 , wherein the constituent layer further includes at least one hole inhibiting layer containing the compound represented by formula (4).
13. The organic electroluminescent device of claim 8 , emitting a blue light.
14. The organic electroluminescent device of claim 8 , emitting a white light.
15. An organic electroluminescent device comprising, between a pair of electrodes, a constituent layer including at least a phosphorescence emission layer comprising a emetal complex containing a metal belonging to groups 8 to 10 of the periodic table as a center metal, wherein at least one in the constituent layer contains a compound represented by formula (1),
wherein A 1 and A 2 represent a substituent; n1 and n2 independently represent an integer of from 0 to 3; X 1 represents an oxygen atom, a sulfur atom, an alkylene group, an imino group, a carbonyl group, a sulfoxide group or a sulfonyl group; X 2 represents an oxygen atom, a sulfur atom, an alkylene group, an imino group, a carbonyl group, a sulfoxide group, a sulfonyl group or a chemical bond provided that when X 1 represents an alklylene group, X 2 represents the sulfur atom, the imino group, the carbonyl group, the sulfoxide group the sulfonyl group or the chemical bond, and when X 2 represents the chemical bond, X 1 represents the imino group, the carbonyl group, the sulfoxide group or the sulfonyl group; and B 1 and B 2 represent a group represented by formula (2),
wherein Z 1 represents an atomic group necessary to form a substituted or unsubstituted aromatic heterocyclic ring; Z 2 represents an atomic group necessary to form a substituted or unsubstituted aromatic heterocyclic ring or a substituted or unsubstituted aromatic hydrocarbon ring; and Z 3 represents a divalent linkage group or a chemical bond.
16. The organic electroluminescent device of claim 15 , wherein in formula (1), X1 represents an oxygen atom, a sulfur atom, or a sulfonyl group.